In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores fall between 75 and 91. What are the mean and standard deviation for this data?
Q: what is the mean : what is the standard deviation : round off to 2 decimal places. What is the…
A: Given: data 27 15 31 16 25 46 25 48 45 28 30 61 19 14 15 26 55…
Q: IQ scores form a normal distribution with u=100 and σ=15. Individuals with IQs between 90 and 110…
A: It is given that the mean is 100 and the standard deviation is 15.
Q: Quartering a positive mean (dividing by 4) has what effect on the normal curve?
A: The normal distribution: A continuous random variable X is said to follow normal distribution if the…
Q: e whether each statement is true or false and briefly explain your answer You have a sample of 100…
A: It is given that we have a sample of 100 observations from a Normal distribution with an unknown…
Q: Find the z-score boundaries that divide a normal distribution. The middle 25% from the 75% in the…
A: Solution: From the given information, 25% area lies in the middle of the normal distribution and 75%…
Q: Mean = %3D (Round to the nearest hundredth.) Standard deviation (Round to the nearest hundredth.)
A: Given : Class Frequency 50 - 59 2 60 - 69 4 70 - 79 5 80 - 89 10 90 - 99 6
Q: The comparison population is represented by the national statistics from 2009 with a population mean…
A: We have given the following data X : 13,13.5,15,14.25,14.5,14.25,13.25,16,16.75
Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…
A: Excel formula: =NORMINV(0.305,0,1)=-0.5100
Q: ccording to a recent survey, the salaries of assistant professors have a mean of $40,756 and a…
A: X follows a Normal distribution with mean = 40756 and S.D = 7500 Then z=(x-mean)/SD =…
Q: Recently, a random sample of 25–34 year olds was asked, "How much do you currently have in savings,…
A: From the different savings class we need to find first the class mid point(xi) . And the frequency…
Q: When finding the percentage of data in a given section of the normal curve, you are finding the…
A: here use basic of normal distribution
Q: A test is scaled so that the mean score is 480 and the standard deviation is 100 test should score…
A: Let X be the random variable from normal distribution with mean (μ) = 480 and standard deviation…
Q: Take Quiz The following cholesterol levels of 10 sampled people were measured in m(g)/(d)l :…
A:
Q: Find the mean and standard deviation for the individualized instruction scores. Scores…
A: Solution-: We find the mean and standard deviation for given frequency distribution table
Q: A z-score tells us how many standard deviations a score is from the mean. What is another word for…
A: Measure of central tendency measures the central value of a dataset. Measured of dispersion measures…
Q: what percent of Americans eat between 9lbs and 19lbs of ice cream each year ?
A: Given Data Population Mean,μ = 16.5 Population Standard Deviation,σ = 2.5
Q: Scores for professionals playing golf on an 18-hole golf course are normally distributed with a mean…
A: From the given information, Consider, X is scores for professionals playing golf on an 18-hole golf…
Q: A recent study explores the relationship between teacher unions and student educational performance…
A: Given that, A recent study explores the relationship between teacher unions and student educational…
Q: Expenditures per shopper at Upscale Clothing have a mean of $130 and a standard deviation of $40 and…
A: Given Information:Mean = $130Standard deviation = $40
Q: Scores range from 0 to 200. The mean for Canadian college students is about 115, and the standard…
A: The given data is as follows:Population mean, Population standard deviation, Sample size, Sample…
Q: A successful basketball player has a height of 6 feet 4 inches, or 193 cm. Based on statistics from…
A: Here, z -score is 2.66. The z -score is Z=(X-µ)/σ
Q: Mean and standard deviation of a distribution are 16 and 2 respectively. At least what percent of…
A:
Q: how do you find standard deviation? how many bars should you have for a standard deviation? do you…
A: Introduction:The standard deviation of a set of observations is the square root of the average of…
Q: What percent of the total population is found between the mean and the z-score given? (Use the…
A:
Q: A normal population has mean u = 55 and standard deviation o = 9. What is the 84th percentile of the…
A: Given that mean u = 55 and standard deviation o = 9.
Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…
A: Given,
Q: Variables Mn SD t value critical Decision SMA-LAGUNA SMA-QC SMA-BULACAN Interpretation: Write your…
A: Tool used : MS excel
Q: uppose you know that the amount of time it takes your friend Susan to get from her residence to…
A: It is given that the mean and standard deviation are 50 and 5, respectively.
Q: The time to complete an exam is approximately Normal with a mean of 49 minutes and a standard…
A: According to the given information in this question We need to fill the graph
Q: Salespeople for a solar technology company have average annual sales of $300,000, with a standard…
A:
Q: A statistics professor gives a survey to each of the 100 students in an introductory statistics…
A: Obtain the population standard deviation:
Q: An incoming MBA a student took placement exams in economics and mathematics. In economics, she…
A: Given data,For EconomicsMean=70sd =6Score=85For Maths:Mean=65sd =11score=90
Q: What is the largest deviation ? What is the smallest deviati
A: Given: Number of households = 10 0 4 1 2 3 1 1 2 0 1 Mean, μ=Sum of ObservationsNumber of…
Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…
A: From the provided information, The probability distribution table is as follow: Number of girls x…
Q: The scores on the exam public health professionals take to be certified follows a normal…
A:
Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…
A: Class frequency (f) Mid vaue (x) f.x f.x2 0-199 342 99.5 34029 3385885.5 200-399 86 299.5 25757…
Q: Scores on an exam were normally distributed. Ten percent of the scores were below 60.0 and 80% were…
A:
Q: re follow a normal distribution with mean 70 and standard deviation 10. What score should you get to…
A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 40%…
Q: cores of an achievement test shows that if follows a normal distribution. It's means is 78 with a…
A: Score of an achievement test follows normal distribution.
In an Algebra class, the scores on a test are
Standard Normal Curve
Mean:
Standard Deviation
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- IQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the z-score for an IQ of 76. Include one decimal place in your answer. Add your answerUse the normal distribution of SAT critical reading scores for which the mean is 514 and the standard deviation is 115. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550? Click to view page 1 of the standard normal table. LOADING... Click to view page 2 of the standard normal table. LOADING... Question content area bottom Part 1 (a) Approximately 1.181.18% of the SAT verbal scores are less than 650. (Round to two decimal places as needed.) Part 2 (b) You would expect that approximately 0.880.88 SAT verbal scores would be greater than 550. (Round to the nearest whole number as needed.)Find SAT Quartiles. SAT scores are reported on a scale from 600 to 2400. The mean is 1498 and the standard deviation is 316. The quartiles of any distribution are the values with cumulative proportions 0.25, and 0.75. What are the quartiles of the distribution of SAT scores?
- SAT : MEAN IS 500 STANDARD DEVIATION IS 100 ACT: MEAN IS 20 STANDARD DEVIATION IS 6Jse the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 64 miles per hour, with a standard deviation of 4 miles per hour. Estimate the percent of vehicles whose speeds are between miles per hour and 72 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately % of vehicles travel between 56 miles per hour and 72 miles per hour.A normal distribution has a mean of 15 and a standard deviation of 2. Find the value that corresponds to the 75th percentile. Round your answer to two decimal places.
- Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 61 miles per hour and 81 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately ________ % of vehicles travel between 61 miles per hour and 81 miles per hour.Find the mean and standard deviation for the individualized instruction scores. Scores Individualized Instruction 50 - 59 4 60 – 69 8 70 - 79 6 80 - 89 8 90 - 99 3 Mean = (Round to the nearest hundredth.)Zoom Add Page Insert Table Chart Тext Shape Media Comment 6. For a population with a standard deviation of o - 6, what is the z-score corresponding to a score that is 12 points above the mean?
- First photo serves as a guide for the answer. Thank you!z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?Find the mean and standard deviation for the individualized instruction s cores. Scores Individualized Instruction 50 - 59 60 - 69 70 - 79 6 80 - 89 11 90 – 99 6. Mean = (Round to the nearest hundredth.) Standard deviation =| (Round to the nearest hundredth.)
